The 66-year-old stars alongside the Hollywood legend in new movie, which releases in October, reported Contactmusic.
"Mr Robert De Niro. My god. A legend and also a dear man. He's very kind. It's like, oh, he's so kind. Why is he so kind? And he's quiet. But he's a lovely man. I really like him. He loves his family.
"You don't think of him that way when you only know him from a distance. I did a movie with him called 'Marvin's Room' a long time ago, but he was a producer. I didn't really know him and he was intimidating to me. But things change," she said.